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        	<h3 id="type">编程题</h3><span id="level">★★★</span>
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            	给出一个区间[a, b]，计算区间内“神奇数”的个数。<br>
神奇数的定义：存在不同位置的两个数位，组成一个两位数（且不含前导0），且这个两位数为质数。<br>
比如：153，可以使用数字3和数字1组成13，13是质数，满足神奇数。同样153可以找到31和53也为质数，只要找到一个质数即满足神奇数。<br>
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                	<h3 class="paper_des_h"><span>●</span>知识点<span>1</span></h3>
                    <p id="knowledge_ids">输入为两个整数a和b，代表[a, b]区间 (1 ≤ a ≤ b ≤ 10000)。</p>
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                	<h3 class="paper_des_h"><span>●</span>知识点<span>2</span></h3>
                    <p id="knowledge_ids">输出为一个整数，表示区间内满足条件的整数个。</p>
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                	<h3 class="paper_des_h"><span>●</span>知识点<span>3</span></h3>
                    <p id="knowledge_ids">a[a, b]区间 (1 ≤ a ≤ b ≤ 10000)。</p>
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                	<h3 class="paper_des_h"><span>●</span>知识点<span>4</span></h3>
                    <p id="knowledge_ids">输入5[a, b]区间 (1 ≤ a ≤ b ≤ 10000)。</p>
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                	<h3 class="paper_des_h"><span>●</span>输出描述</h3>
                    <p>输出为一个整数，表示区间内满足条件的整数个数</p>
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                	<h3 class="paper_des_h"><span>●</span>输入例子</h3>
                    <p>11 20</p>
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                	<h3 class="paper_des_h"><span>●</span>输出例子</h3>
                    <p>6</p>
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